Kyowa Co., Ltd.

Sumitomo Corporation

Koji Kajiwara

Hironori Kawamura

Shigeru Matsuo

Ikuo Moriyama

Hirofumi Koyama

Satoshi Inagaki

Masataka Kinoshita

Yoshihiro Ogawa

Kotaro Oda

Issei Umetsu

Hidehiro Fujita

A bag bodyis filled with stones. A restraining ropeextends from the bottom of the bag bodythrough the center of the bag bodyand is pulled up together with a lifting ropeto lift the bag body. The bag bodyis within a predetermined range centered about a curve given by W/H1 (diameter/restraining rope length)=15.898×(W/W0)−17.784×(W/W0)+6.6314, where W represents the diameter of the bag body, H1 represents the length of the restraining ropefrom the bottom portion of the bag bodyto a root position of a mouth closing ropeof a bag material through the center of the bag body, and W0 represents the diameter when the bag materialis filled with the filling material

Bag body and method for producing bag body

A bag material has a tubular shape and can be folded back at an intermediate position in a longitudinal direction. Crushed stones can be stored in a folded part of the back material. An opening on one side of the bag material can be moved to a position close to an opening on the other side of the bag material. A one-side closing rope that closes the opening on the one side of the bag material is provided near this opening. An other-side closing rope that closes the opening on the other side of the bag material is provided near this opening. The other of the one-side closing rope and the other-side closing ropes can be released with the opening closed by one closing rope.

Bag material and crushed stone placement method using bag material

A scour prevention unit includes a bag body housing block objects in a bag material, and a cloth integrated with the bag body, wherein the cloth is housed in the bag material and is laid below the block objects, or is fixed below the bag body outside the bag body by fixing means.

Scour prevention unit and scour prevention method

Growing community of inventors

Osaka, Japan

Koji Kajiwara